TOYOTA 2011 Prius - Manual (Page 544)

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5-2. Steps to take in an emergency
PRIUS_U (OM47685U) DVD
Warning message Details
Correction
procedure
(If equipped)
Indicates that the pre-collision
system is not currently func-
tional because the grille or the
sensor is dirty.
This message also appears
when the pre-collision system
is not functional due to over-
heating.
Check the grille
and the sensor and
clean them if they
are dirty. In case of
overheating, the
system will become
functional once the
system cools
down.
(Flashes)
(If equipped)
Indicates that the radar cruise
control sensor is dirty or cov-
ered with ice.
Clean the sensor.
(Flashes)
(If equipped)
Indicates that the radar cruise
control system is unable to
judge vehicle-to-vehicle dis-
tance.
If the windshield
wipers are on, turn
them off or set
them to either the
intermittent or the
slow mode.